docs: def _write_bin(self, data, stream, byte_order):
          '''
          Write data to a binary stream.
  
          '''
          (len_t, val_t) = self.list_dtype(byte_order)
  
          data = _np.asarray(data, dtype=val_t).ravel()
  
          _write_array(stream, _np.array(data.size, dtype=len_t))
          _write_array(stream, data)